What causes both headlights to stop working?
Solution: If both headlights aren’t working, it’s unlikely that a bulb is at fault. The likely cause is a fuse, headlight relay, headlight switch, dimmer switch or a wiring fault. About the only cause that is an easy fix is a blown fuse.
Is there a fuse that controls the headlights?
Headlight Fuse or Relay
This protects all the components on the circuit. If a headlight fuse blows, it could cause the headlights to stop working. Most headlight systems are also designed with a relay that switches the power between low beam and high beam headlights.
Why are my high beams working but not my headlights?
Headlight Switch is Broken
It may get stuck in position for the high beams or the switch could wear out and simply not turn the headlights on at all. If the switch is bad, replacing it with a new OEM headlight switch is typically the best answer.
What would cause low beam headlights not to work?
A Fuse Has Blown
If the bulbs themselves aren’t to blame, they may have failed due to a blown fuse. Replacing the fuse may solve the problem. However, if the fuse burns out again, your headlight failure may be due to the next issue.
How do I know if my headlight relay is bad?
Symptoms of a Bad or Failing Headlight Closure Relay
- Headlight doors don’t open.
- Headlight doors stuck open.
- Headlight doors operate erratically and open or close on their own.
Where is the relay for headlights?
The headlight relay is typically located in the power distribution box in the engine compartment.
Where is the headlight relay?
Where is the headlight relay switch located?
Find the headlight relay closure:
Usually, it is under the hood of the car. The point where your fuse panel is most likely located. On the other hand, it may also be located inside the cab of the car, this would be the case if your car comes with an interior fuse box.
How do you check a headlight circuit?
How to Check That Power Is Getting to the Headlights: Use a Test Light. Unplug the light bulb electrical connector. Turn on the headlights. Connect your test light to a good ground and touch the test light probe to the power side of the connector terminal.
What are the symptoms of a bad headlight switch?
One of the most common symptoms of a faulty headlight switch is issues switching between headlight modes. If the headlight switch fails or wears out it can cause problems operating the headlights. A broken switch may only work on certain modes, or may cause them to come on and off intermittently and erratically.
How do I know if my light control module is bad?
If you notice any of the following problems, you may have a faulty Light Control Module in need of repair.
- Headlights do not turn on or are intermittent.
- Certain or all taillights have stopped working.
- Brake lights no longer function or are intermittent.
- Turn signals do not blink or blink too quickly.